Add some stuff to help with using C in link.ld

link.ld

@@ -1,22 +1,31 @@
 ENTRY(_start)
 
-SECTIONS {
-    . = 0x80000000;
-
-    .text : ALIGN(4) {
-        *(.text*)
+MEMORY {
+    RAM (rwx) : ORIGIN = 0x80000000, LENGTH = 1M
 }
 
+SECTIONS {
+    .text : ALIGN(4) {
+        *(.text._start)
+        *(.text*)
+    } > RAM
+
     .rodata : ALIGN(8) {
         *(.rodata*)
-    }
+    } > RAM
 
     .data : ALIGN(8) {
+        _data = .;
         *(.data*)
-    }
+        _edata = .;
+    } > RAM
 
     .bss : ALIGN(8) {
+        _bss = .;
         *(.bss*)
         *(COMMON)
-    }
+        _ebss = .;
+    } > RAM
+
+    _stack_top = ORIGIN(RAM) + LENGTH(RAM);
 }